Henry v



(No Model.)

H V. SMITH.

BIT STOCK. No. 274,040. Patented Mar. 13,1883.

v UNITED STATES.

PATENT tripe.

HENRY V. SMITH, OF PLANTSVILLE, CONNECTICUT, ASSIGNOR OF ONE-HALF TOGEORGE E. CRUTTENDEN, ()F SAME PLACE.

BIT-STOCK.

SPECIFICATION forming part of Letters Patent No. 74,040, dated March'13, 1883.

Application filed November 17, 1882. (No model.)

To all whom it may concern:

Be it known that I, HENRY V. SMITH, of Plantsville,in thecountyofHartford and State of Connecticut, have invented a new Improvement inBit-Braces; and I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in-

Figure l, a side view; Fig. 2, a vertical central section; Fig.3, an endview of the socket.

This invention relates to an improvement 1 in that class of bit-bracesin which the socket is divided or split, the two parts drawn together bya clamping-screw at substantially right angles to the split, this classof braces being well known as the Spofl'ord Brace. In the Spotford bracethe socket is split in a plane parallel with the handle or crank of thebrace, and so that the split extends into the arm to give a certainamount of elasticity to the two parts of the socket. This is an ex- 2 5pensive construction, and the jaws work toward and from each other, asif swinging or hinged at their upper endtl1at is, they open at the monthend faster than at the upper end, or where theyare connected. Hencethere is a 0 constant varying taper to the recesses in the two parts ofthe socket.

The object of myinvention is to simplify the construction and cause thetwo parts of the jaws to work parallel to each other; and it 3 5consists in dividing the socket vertically and separating the one partfrom the other-one part attached to the arm of the brace, the otherprovided with a guide to entera corresponding seat in the other part,and at right 4:: angles to their meeting surfaces, combined with aclamping device by which the jaws may be forced together or permitted toseparate, as more fully hereinafter described.

-A B represent the two parts or jaws of the 5 socket. I The one part, A,is fixed to the arm C of the brace, and is preferably made with aprojection, D, at right angles to it, and to which the arm C isattached. The part B is 'made separate and independent of the part A,and is constructed witha guiding-stud, E,

which enters a corresponding recess, F, in the face of the part A, andwhich recess extends into the projection D. This recess F is deeper thanthe guiding-stud E, and in the recess, before the stud is introduced, aspring, G, is placed, so as to bear against the end of the stud, andtending to force the part B from the part A. The part A is provided witha fixed nut, H, and the other part with a fixed collar, 1; or theposition of the collar and nut may be reversed. p

L is a clamping-screw introduced through the collar I, and so as to bearthereon, the threaded portion extending into the not H. Henceby turningthe screw in one direction the two parts will approach each other, andturning-it in the opposite direction will permit the separation of thetwo parts, they being caused so to do by the spring G.

The adjacent faces of the two. parts A are each constructed with arecess, rain the usual manner of recessin g the jaws of bit-braces, andso that the tang may be introduced through the opening in the end of.the socket, and when in proper position the two parts clamped togetheruponthe tang of the bit by simply turning the clamping-screw L. ThestudE serves as a guide to support the two parts of the brace parallel toeach other, and. from which they cannot depart any fartherthan theslight play which the fitting of the stud in the re cess permits. Theyseparate from and approach each other, always maintaining their ownrespective planes parallel the one to the other. By this construction Iam enabled to cast the two parts A B from malleable iron. They requirebut very little mechanical labor in fitting, and a brace is produced notonly cheaper, but stronger and more durable than the common andwell-known split socket.

Instead of the screw as the means of clamping the two parts together,anyknown clamping device used for this purpose may be employed.

1 claim---- v A bit-brace having the socket formed in two parts, A B,the one part attached to the arm of the brace, the other separate andindependent, the one part constructed with a guidthe stud on the otherpart, and in opposition ing-stud on its inner face, the other with acorto the clamping device, substantially as deresponding recess, inwhich the said stud will scribed.

work, the meeting faces of the two parts re- HENRY V. SMITH. cessed. toreceive the tang of the bit, with a Witnesses: clamp to force the twoparts together, and a LEWIS O. HULL,

spring in the recess in one part to bear against EDWARD R. DU BOIS.

